A daily bulletin containing necessary speed restrictions issued by the Train Dispatcher.

• A. Schedule
• B. Timetable
• C. General Notice
• D. Temporary Speed Restriction Bulletin (TSRB)

Answer: (D)

Temporary speed restrictions are communicated to train crews through the Temporary Speed Restriction Bulletin. This daily bulletin, issued by the Train Dispatcher, lists the exact speed limits, the track sections affected, and the time window during which the restrictions apply. It exists to convey changes that are temporary due to conditions like track work or incidents, so crews know the safe speeds to maintain on specific parts of the route. Schedules and timetables are about when trains run and their planned timings, not current speed limits. A General Notice covers broader information and is not tied to a specific speed restriction. Therefore the bulletin that communicates these temporary speed changes is the Temporary Speed Restriction Bulletin.